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损伤指标
相关语句
  damage index
    Furthermore, using numerical simulation of some damage cases and give the feasible damage index.
    在此基础上,利用数值模拟了桥梁的多种损伤情况,提出了可行的损伤指标
短句来源
    Four parts on RC beams damage are mainly studied as follow. (1) A damage index of concrete based on the decline of stiffness is established.
    将本文所做的主要研究工作摘录如下:(1)基于混凝土材料的刚度下降定义了混凝土拉压损伤指标
短句来源
    Then the cross-section damage index is defined, including ordinary concrete cross-section, prestressed concrete cross-section and unloading concrete cross-section.
    定义了普通混凝土截面、预应力混凝土截面、考虑卸载情况的混凝土截面的损伤指标
短句来源
    Based on the basic theory of element modal strain energy change and structure shape change before and after damage, the damage index was put forward to locate structure damage, the basic formulas are obtained firstly to identify the damage location and discriminate qualitatively the damage degree for beams and plates, and the program is compiled in calculating the damage index for beams and plates.
    基于单元模态应变能改变的基本理论,根据损伤前后结构振型的改变,提出了用于结构损伤定位的指标,并首次推导了识别结构损伤位置及定性判别混凝土梁和板损伤程度的基本公式,编制了梁和板损伤指标的计算程序。
短句来源
    The damage index is used to identify the damage in a concrete beam and a concrete plate in the numerical simulation and calculation analysis.
    利用该损伤指标分别对混凝土梁和混凝土板的损伤进行了数值仿真模拟和计算分析。
短句来源
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  damage indicator
    Hence, for such kind of damage, using the new damage indicator, namely, displacement integration, to identify structural damage should be paid more attention.
    因此,就此类损伤而言,可以考虑用位移积分这一新的损伤指标对结构的损伤进行检测和分析。
短句来源
  the damage index
    Based on the basic theory of element modal strain energy change and structure shape change before and after damage, the damage index was put forward to locate structure damage, the basic formulas are obtained firstly to identify the damage location and discriminate qualitatively the damage degree for beams and plates, and the program is compiled in calculating the damage index for beams and plates.
    基于单元模态应变能改变的基本理论,根据损伤前后结构振型的改变,提出了用于结构损伤定位的指标,并首次推导了识别结构损伤位置及定性判别混凝土梁和板损伤程度的基本公式,编制了梁和板损伤指标的计算程序。
短句来源
    The damage index is used to identify the damage in a concrete beam and a concrete plate in the numerical simulation and calculation analysis.
    利用该损伤指标分别对混凝土梁和混凝土板的损伤进行了数值仿真模拟和计算分析。
短句来源
    The damage-repair process is described by Renewal Process. The damage index of a member is expressed in terms of the ratio of maximum curvature to the ultimate one at the position of plastic hinge.
    用更新过程来描述损伤-修复过程,损伤指标用构件塑性铰处的最大曲率和极限曲率的比表示;
短句来源
  “损伤指标”译为未确定词的双语例句
    Applicability Analysis of the Damage Identification Indices of Suspension Bridges
    悬索桥损伤指标的适用性分析
短句来源
    Selecting the branch of part measured point from modal parameter, this paper deduces the damaged index which can detect the possible damaged location of the cable-stayed bridge deck and identifies the damaged region and degree for Yonghe Bridge.
    并从模态参数中选取部分点的分量,导出可以指示斜拉桥桥面(主梁)大概损伤位置的Index损伤指标,识别出斜拉桥发生破损的区段及破损程度;
短句来源
    The general relation between the damage and strain of the beam cross-section is set up and the stress-strain curves of cross-section are made, through the analysis on cross-section balance.
    通过截面平衡分析,建立了混凝土损伤指标与截面应变关系的一般公式,并得到截面广义力—位移关系曲线。
短句来源
    The concrete damage of simply supported beams can be effectively assessed by these two defining damage methods. The results show that both methods are feasible and close to reality by analyzing the whole damage process of simply supported prestressed RC beams and RC beams which have different reinforced ratios and loads.
    应用此损伤指标描述了简支梁中混凝土的损伤,通过对适筋梁、少筋梁、超筋梁以及普通RC梁和预应力RC梁的对比研究,显示了该损伤定义方法的可行性及其与实际现象的一致性。
短句来源
    3.This paper sets up the finite element model of continuous-beam bridge tocompare of two index——curvature mode difference and flexibility curvaturedifference. In the paper we can find that flexibility curvature difference is an advanced and applied index.
    3.以曲率模态和柔度曲率理论为基础,并以连续梁桥主梁损伤为工程实例,检验了模态分析技术当中曲率模态差和柔度曲率模态差两类损伤指标用于桥梁损伤定位的效果,认为利用振动测试技术得到的模态信息经过模态分析技术的处理可以对桥梁损伤的位置进行一定程度的识别,从而实现桥梁损伤分步识别的第一步。
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  damage index
A damage index, used to identify possible locations and corresponding severities of local damage, is defined and expressed in terms of modal displacements that are obtained numerically from mode shapes of the undamaged and the damaged structures.
      
Based on a small damage assumption, a damage index equation is revealedn the context of elasticity.
      
It turns out that the resulting damage index equation inherently suffers from singularities near inflection nodes.
      
With the aid of the singular value decomposition technique, the solution to the damage index equation is achieved in the Haar wavelet space.
      
Next, the physical desired solution to the damage index equation is reconstructed from the one in the wavelet space.
      
更多          
  damage indicator
A means of using a semiconductor film element as a fatigue-damage indicator is substantiated.
      
One damage indicator is a shift of the optimum length for peak active tension, in the direction of longer muscle lengths.
      
A novel statistical algorithm was proposed to extract a damage indicator by computing mode shapes of vibration testing before and after damage in timbers.
      
The proposed damage indicator, computed from the first two flexural modes, was capable of detecting all damage locations.
      
After a review of the literature on the prognosis of ductile fracture, a damage indicator is developed which is based on micromechanical results and adapted to experiments.
      
更多          
  the damage index
With the aid of the singular value decomposition technique, the solution to the damage index equation is achieved in the Haar wavelet space.
      
Next, the physical desired solution to the damage index equation is reconstructed from the one in the wavelet space.
      
The regressions of yield loss on the damage index were used to separate the genotypes into four groups according to the possession of antibiosis and/or tolerance mechanisms.
      
Whereas Bi and the bitterness intensifier genes are not related to the resistance factors acceptance and oviposition, they are related to resistance or tolerance as measured by the damage index.
      
Next, the damage accumulation problem is dealt with and two different proposals for the damage index are given.
      
更多          


From the point of view of the vehicle passive safety,this article describes thehuman body injury criteria,the dummies existed today and the mechanical and mathematicalmOdels used in research work.Several popular computer simulation softwares are also included.This article can be used for reference in the research and development of the dummiesand the three-dimensional computer simulation softwares in China.

本文从汽车被动安全性角度出发介绍了有关人体损伤指标、现有的假人、研究中使用的力学和数学模型以及几个通用的人体计算机模拟软件。本文可供我国研制假人和开发三维人体计算机模拟软件参考。

A computer method is proposed to determine the reliability of bridge when impacted by a sailing ship in this paper. The local damage distribution in the bridge structure caused by the ship impact is calculated by nonlinear FEM analysis. The local damage is represented by the density of material damage in the local area. The material damage, which is a function of the plastic strain and the plastic strain rate, is included in the bridge material model. The calculated local damage data, test data and the historical...

A computer method is proposed to determine the reliability of bridge when impacted by a sailing ship in this paper. The local damage distribution in the bridge structure caused by the ship impact is calculated by nonlinear FEM analysis. The local damage is represented by the density of material damage in the local area. The material damage, which is a function of the plastic strain and the plastic strain rate, is included in the bridge material model. The calculated local damage data, test data and the historical damage data of the bridge are analyzed by knowledge-based expert system to give the global damage index of the bridge structure. The global damage index is used to stand for the current safety status of the bridge. If the global damage index is higher than a given critical value, safety control on the bridge is advised to take or the bridge is simply discarded. Otherwise, the damaged bridge could continue to be in service, and its future safety level is predicted by assuming that some possible disasters such as being impacted by sailing ships, earthquake, etc are encountered in future. If the predicted future safety level is low, the damaged bridge should be repaired in advance. Finally, the Qing Jiang Gao Ba bridge was analyzed as an example to show the effectiveness of the method.

本文提出了一种对撞桥灾害进行评价的计算机方法。首先用非线性有限元法计算由于船撞引起的桥体局部损伤分布,局部损伤用材料损伤在该处的密度表示,材料损伤是塑性应变和塑性应变率的函数,在桥体材料模型中加以反映,通过对有限元计算出的桥体局部损伤数据、现场测量数据和大桥以往累积损伤数据进行分析,利用专家知识库确定大桥目前整体损伤指标,用整体损伤指标表示大桥当前的安全状态,如果整体损伤指标超过给定临界值,则大桥退役或需要进行大的安全防护措施,否则,大桥可以继续服役,但需对其在未来如船撞、地震等可能灾害作用下的安全性能进行预测,如果预测出的安全性偏低,则需要对大桥提前进行维修。用所提出的方法对清江高坝大桥船撞灾害的实例进行了应用,验证了方法的有效性。

A damage localization for the Tsing Ma bridge deck is studied through a business program in the paper.A two-stage method is employed for the damage localization.In the first stage,the Tsing Ma bridge deck is divided into several segments.A damage index is derived from modal components for indicating the damaged region.That means to identify where is the damaged deck segment.In the second stage,the artificial neural network is used to identify damaged member in a damaged segment.The results show that the proposed...

A damage localization for the Tsing Ma bridge deck is studied through a business program in the paper.A two-stage method is employed for the damage localization.In the first stage,the Tsing Ma bridge deck is divided into several segments.A damage index is derived from modal components for indicating the damaged region.That means to identify where is the damaged deck segment.In the second stage,the artificial neural network is used to identify damaged member in a damaged segment.The results show that the proposed method is feasible for the damage localization of a deck structure.

通过数值模拟研究了香港青马大桥桥板结构的损伤位置识别问题。分两阶段来识别青马大桥桥板结构的损伤位置 ,在第一阶段 ,将青马大桥桥板结构划分为许多桥板段 ,并根据部分模态分量导出了一个损伤指标 ,用于指示大概的损伤区域 (桥板段 ) ;第二阶段 ,在已知损伤桥板段后 ,采用神经网络方法来识别具体的损伤构件。数值模拟结果表明 ,采用本文提出的损伤指标、采用神经网络方法 ,分两阶段进行青马大桥桥板结构的损伤位置识别是有可能的。

 
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